La/GNPs:ZnO Nanocomposite Microclusters Synthesized by Electrospinning–Calcination: Structural and Optical Characterization
- Manica D., Varasteanu P., Bucur S., Brîncoveanu O., Romanițan C., Pachiu C., Suchea M.P., Koudoumas E., „La/GNPs:ZnO Nanocomposite Microclusters Synthesized by Electrospinning–Calcination: Structural and Optical Characterization” IEEE 2025 International Semiconductor Conference (CAS), Octombrie 2025.
- https://doi.org/10.1109/CAS66707.2025.11222321
Abstract:
This paper reports on the fabrication and characterization of nanocomposite microclusters synthesized via the electrospinning–calcination method. Precursor solutions containing zinc acetate, lanthanum salt, and graphene nanoplatelets (GNPs) in a polyvinyl pyrrolidone (PVP) matrix were electrospun and calcined to yield highly porous, nanostructured powders. Structural, morphological, and optical properties were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, and UV-Vis spectroscopy. The results confirm the homogeneous integration of La and GNPs into the ZnO matrix, with preserved wurtzite structure and enhanced sub-bandgap absorption. Raman spectra revealed structural defect modes and weak graphene features. The synthesis showed good reproducibility across replicated batches. These findings demonstrate the potential of electrospinning-calcination for developing multifunctional ZnO -based hybrid nanomaterials tailored for optoelectronic and sensing applications.
Date of Conference: 07-11 October 2025
Date Added to IEEE Xplore: 06 November 2025